There are two statues in the world map of Kagura Amahara which contains a secret.
One is directly east of Kagura Amahara's castle (Kaguya's home). You'll find pink trees (sakuras) scattered in the eastern part of the world map. The area beyond it seems inaccessible, but it's not. You can easily walk through the small sakura trees, even though you can't walk over the big ones. But just keep walking all the way to the eastern corner and you should find a gray thing sticking out. That's the first statue. Push A in front of it and there will be an option to Shoot, Ring or Leave. Choose Ring and you'll get a Daifuku.
The other statue is directly north of Megi Castle. Just circle up and all the way east to find another gray thing; our second statue. Again, push A in front of it and from the options of Destroy, Pray and Leave, choose Pray. You'll get a Mochi.
You can get these two items once a day (24 hours real-life time). So after you collect them, wait until tomorrow and you should be able to collect it again, and then the day after, and so on.
If you choose to Shoot the first statue or Destroy the second statue, you'll fought a pretty strong enemy and get an Energy Drink after each battle and the statues will be gone permanently afterward. I think it isn't worth it compared with the unlimited Mochi and Daifuku, but it's your choice.